Benzocaine is a widely used local anesthetic often used in various forms and preparations of topical pain relievers. It is widely available as topical creams, but can also be found as sprays, oral gels, capsules among other forms. Benzocaine relieves pain by blocking sodium from passing electrical signals to the pain receptors which trigger the sensation of pain. It also finds use as a fish tranquilizer, as part of anti-inflammatory drugs and even as an essential component in certain desensitizing condoms.
Benzocaine is primarily used to treat various pains on the surface of the body such as burns, skin irritations, sunburn, irritation from sore throat and teething, ingrown toenails, vaginal or rectal irritation or even hemorrhoids. It is also used in some ear drops to treat impacted ear wax and ear irritation. It is also used to relieve pains caused by toothache and other dental conditions or to treat skin conditions such as canker sores and warts.
It is also sometimes administered to numb the vagina or rectum prior to insertion of probes, tubes or other tools to reduce discomfort.
No matter what preparation of benzocaine is used, always follow precisely instructions for use described in the label or as prescribed by the doctor.
For treatment of minor skin irritation using topical creams, apply a thin coat of the benzocaine cream up to 4 times a day. If using the spray formulation, spray it 6 to 12 inches away from the skin and avoid spraying it directly onto the face – rather, use your hands to wipe it on affected areas to avoid eye contact. For hemorrhoid treatment, clean the affected area thoroughly with soap and water before applying the topical cream up to 6 times a day. If using rectal suppositories, empty your bowels and bladder prior to administration. Always use the smallest amount of medication possible to treat the conditions.
When using to ease insertion of tubes and other medical tools to body cavities, apply a thin even coat of the benzocaine preparation to the parts coming in contact with the body.
Benzocaine may produce some extended numbness as well as some mild irritation when first applied, but certain individuals may exhibits allergic reaction to benzocaine. Seek medical attention when experiencing any sign of allergic reaction such as rashes, fever, sore throat, or inflammation.
Benzocaine may also cause methemoglobinemia, where the red blood cells are unable to bind oxygen molecules and causes a lack of oxygen in the body. This medication can also aggravate existing cases of this condition, and is also not advised to be administered to patients suffering from respiratory conditions such as asthma or emphysema.
Do not use large amounts of benzocaine on your skin as these excessive amounts are quickly absorbed through the skin and may aggravate the condition rather than heal it. Overdose may occur as a result of this excessive application and symptoms may include irregular heartbeats, convulsions and seizures, slowed breathing which may to an actual respiratory failure.
Benzocaine has the following structural formula:
• Molecular formula of benzocaine is C9H11NO2
• Chemical IUPAC Name is ethyl 4-aminobenzoate
• Molecular weight is 165.189 g/mol
Brand name(s): Aethoform, Americaine, Anaesthesin, Anaesthin, Anestezin, Anesthesin, Anesthesine, Anesthone, Anivy, Appedrine, Arkodyne, Baby Anbesol, Dermoplast, Ethoform, Ethyl Aminobenzoate, Gercillin, Hurricaine, Identhesin, Keloform, Norcain, Norcaine, Orthesin, Parathesin, Parathesine, Solarcaine, Solu H, Topcaine
Review published on: 13 June 2009
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